mariomiller7
Citroen DS3 Boost Pressure Defect
Summary of the thread
A 2017 Citroen DS3 with a gasoline engine is experiencing a boost pressure defect, characterized by an intermittent check engine light, reduced engine power, stalling, increased fuel consumption, and a whistling noise escalating to a hissing sound during acceleration. The symptoms suggest a potential wastegate valve defect, but other components like the pressure sensor, throttle body, or MAP sensor could also be involved. It is recommended to have the vehicle inspected by a professional to accurately diagnose and address the issue.
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4 comment(s)
mariomiller7 (community.author)
The possibility of a faulty sensor had crossed my mind as well. Can you elaborate on the specifics of your situation with the Saab 9-3, particularly with respect to the symptoms you experienced and whether the diagnostic process revealed any anomalies beyond a malfunctioning wastegate valve itself?
uwe_fuchs8
Yeah, mine ended up being the wastegate valve in the turbo. It was sticking, causing the boost to fluctuate wildly. The garage said something about it being a common fault. Honestly, with all those symptoms you've got, I'd bite the bullet and get it checked out by someone who knows their stuff. Could save you a world of pain in the long run.
mariomiller7 (community.author)
Based on your recommendation, I've decided to schedule a workshop visit to assess and rectify the issue. Repair resulted in a cost of 860€. Thank you again for your assistance.
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CITROEN
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DS3
uwe_fuchs8
Bloody hell, that sounds familiar! Had almost the exact same thing with my Saab 9-3 – check engine light, power loss, the lot. Though I didn't get the whistling and hissing combo, just a really annoying whistle. You reckon it's definitely the wastegate? Could be a dodgy sensor throwing things off.